Harrow



(No Model.)

M. P. MIGFIFIELL.v

HARROW.

Patented Aug. 8, 1882.

WI TJV' ESSES NTTED STATES PATENT OFFICE.

MONTRAVILLE P. MIGHELL, OF WATERMAN STATION, ILLINOIS.

HARROW.

SPECIFICATION forming part of Letters Patent No. 262,456, dated August 8, 1882.

Application tiled February 2, 1882. (No model.)

To all whom t may concern Be it known that I, MoN'rRAvILLE P. MIG- HELL, of Waterman Station, in the count-y of De Kalb and State of Illinois, have invented certain new and useful Improvements in Harrows; and I do hereby declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, which form a part of this specification, and in which- Figure l is a plan or top view of one of the sections of my improved harrow, all of the sections, of which there may be two or more, being constructed alike. Fig. 2 is a longitudinal section through one ot' the bands which connect the adjustable tooth-bars. Figs. 3 and 4 are side elevations, representing opposite sides of the harrow with the teeth in different positions; and Figs. 5, 6, and 7 represent modified constructions of the cross-bars which connect the parallel tooth-bars.

Similar letters of reference indicate corresponding parts in all the figures.

My invention relates to that class of harrows in which the tooth-bars are pivoted to admit of the adjustment of the teeth from a vertical to a slanting position, and vice versa 5 and it consists in the improvements hereinafter more fully described, and particularly pointed out in the claim.

The several sections which make up the complete harrow are all alike in construction and attached to acommon drag-bar in a manner well understood. I have shown, therefore, only one of said sections, the description of which will apply to all.

Y A A are the tooth-bars, which are preferably of wood and provided with straight teeth B. The several bars A A are connected parallel to one another by bands of hoop or strap iron O, which are looped around the rounded or cylindrical parts a a of each bar, doubled around the last bar, and then passed back on the under side, the straight doubled part of the strap or band C between each of its loops C being united by rivets b b, as will appear by reference to Fig. 2 of the drawings. It' desired, however, a somewhat modied construction may be adopted for connecting the parallel tooth-bars. Thus, in Fig. 5 I have shown the bars connected by a transverse wooden beam or bar, H, having semicircular recesses hv to receive the rounded parts a of the toothbars, which are covered by metal caps H' H. In Fig. 6 the construction is the same, with the dierence only that the cap H consists ot' a single .piece made with two loops or bends, one for each of the boxes or recesses in the bar. In Fig. 7 the part of the doubled con'- necting-strap C between each loop G is spaced by a wooden block, c, through which the rivets b b are passed. In each case it will be seen that boxes are formed for the rounded parts a of the tooth-bars, so that the latter may turn freely.

Upon each of the tooth-bars A is bolted an elbow or angle-iron, D, the several elbows being in a line with one another, and their upright arms pivoted by bolts d to a cross-bar, E.

To one of the tooth-bars A is secured rigidly, by a casting, f, a lever, F, which is provided With a detent or spring-pawl, F', adapted to engage with a segmental rack, Gr, secured upon the crossbar E.

From the foregoing description, taken in. connection with the drawings, the operation and advantages of my improved harrow will readily be understood. By raising the lever F it can be changed instantly from a straigh ttooth7 to a slanting-tooth harrow without stopping the team.

It often occurs that diierent kinds of soil are found in the same eld, requiring different setting 7 of the harroW-teeth. When the soil is soft a barrow with straight 0r vertical teeth will run too deep. By tilting the tooth-bars in the manner described any depth of run can be procured, and if the barrow fills with rubbish it can be cleaned in an instant by slanting the teeth, which, after clearing, can be reset into their former position by the lever Without stopping the team.

Having thus described my invention, I do not claim broadly a barrow having pivoted tooth-bars and means for adjusting the same and holding them in their adjusted position; but

What I claim as my improvement, and de- IOO sire to secure by Letters Patent of the United In testimony that I claim the foregoing as States, ismy own I have hereunto aixed my signature Io The connecting-bars C, doubled to form in presence of two witnesses. loops or' boxes C', and riveted at b b between k 5 said boxes, in combination with the tooth-bars MONTRAVILLE MERCE MIGHE'L' A, having cylindrical parts a, substantiallyas Witnesses: and for the purpose herein shown and de- GEORGE XV. PLAGE,

scribed. WILLIAM WHEELER. 

